基于整数小波变换的彩色图像水印算法

Color image watermark algorithm based on integer wavelet transform

随着Internet的普及和多媒体技术的发展,多媒体信息的安全及版权问题引起了越来越多人的关注,数字水印技术应运而生。整数小波变换能实现从整数到整数的变换,减少了由于浮点数的存在带来的误差,在整数小波变换的基础上设计了一种新的水印嵌入算法,采取了对整数系数进行二值分解后的最后一位进行水印嵌入的方法,且提取时完全不需原始图像,是一种有效的盲水印算法,对各种攻击均具有较好的稳健性。

Along with the development of internet and multimedia techniques,More and more people pay attention to the security of multimedia information and its copyright protection,thus watermark techniques appear,integer wavelet transform can map integers into integers, which reduces the error made by floating numbers. In this paper, a new embedding algorithm is designed, which decomposed the integer coefficients into binary values and embeds watermark into the last bit. Primitive image is not needed when extracting watermark, so it＇s an effective and blind algorithm, It ＇s steadiness to most of the attacks.